The breast/arms embellishment is way over the top on both girls – the model and Emily. It unnecessarily adds a whole lot of volume.
On top of that, I am also bothered by the length of the dress on Emily and how it completely matches her skin-tone and hair under that light.

I am seriously bothered by the end-result. It’s simply not doing her any favours.

It’s pretty, but I wasn’t wowed. It looks a little more matronly on Emily than it does on the model. I think the heavy eye make-up and lower hemline exacerbates this. It looks whimsical on the model, but stops short of ethereal on Emily.

In my opinion, a dress that relies so heavily on a dramatically cinched in waist shouldn’t be worn by someone with a barrel-like torso.. it could be the angle, but I don’t think Emily pulled it off to maximum effect.
Also, her olive complexion worked against the dress as her decolletage blends in with the rest of the gown, which I believe defeats the purpose of the sheer panel.

I think this is a good analysis, but there is also something off a about the way the sheer panel fits on her particular shape–I want a visible neckline to compete a little bit with all that ornamentation on the bust.